Julius r



(No Model.)

J. R. WATTS. DRILL FOR BORING AND REAMING'.

Patented May 5,1891.

lT/VESSES ATTORNEYS we NORRXS vital-1s cn. Puma-mun, WASHINGTON, 04 c. v

'UNiTno STATES ATENT Prion.

JULIUS R. IVATTS, OF SPRINGFIELD, ILLINOIS, ASSIGNOR TO HIMSELF AND EDVIN A. IVILSON, OF SAME PLACE.

DRILL FOR BORING AND REAMING.

SPECIFICATION forming part of Letters Patent No. 451,789, dated May 5, 1891.

Application filed September 13, 1890. Serial No. 364,846. (No model.)

To all whom, it may concern:

Be it known that I, JULIUS R. \VATTS, of Springfield, in the county of Sangamon and State of Illinois, have invented a new and useful Improvement in Drills for Boring and Beaming, of which the following is a full, clear, and exact description.

My invention relates to an improvement in drills specially adapted for boring into coalbanks, and has for its object to provide a machine of simple, durable, and economic construction, and to provide said machine with an expansible bit.

A further object of the invention is to provide a means whereby the bit will remain in its closed or normal position while the hole is being bored, but wherein, when a predetermined depth is reached, the machine may be conveniently and expeditiously manipulated to expand the bit, and thereby create a pocket at the end of the bore for the reception of a large amount of powder. By reason of the pocket the liability of blowing the tamp out IS effectually overcome, and the blast is made to produce a maximum of desired result.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth,and pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar figures and letters of reference indicate corresponding parts in all the Views.

7 Figure 1 is a side elevation of the machine. Fig. 2 is a plan view thereof. Fig. 3 is a vertical section on line 3 3 of Fig. 2. Fig. at is a sectional view of the'feeding-sleeve. Fig. 5 isa vertical section on line 5 5 of Fig. 2. Fig. 6 1s a longitudinal section through the augercasing and a side elevation of a portion of the drive-shaft, and Fig. 7 is an enlarged vertical section through the outer end of the said augercaslng.

The base 10 consists, preferably, of a bar of any desired length and width, the said bar being provided in its under face at or near its forward or inner end with a spur 11, adapted to be driven in the foundation upon which the base rests and to serve to retain the base in position.

At or near the rear or outer end of the base, upon 1ts upper face, a yoke 12 is preferably pivoted, the members whereof near their upper ends have sockets 13 produced therein. In the yoke 12 a guide-box 1a is horizontally pivoted, which guide-box is mainly located between the members of the yoke and is provided at its sides with tr-unnions 15, adapted to enter the yoke-sockets 13. The guide-box is made in two horizontal plate-sections CL and a, having a hinged connection 16 at one side and provided with a latch 16 at the opposite side, the said latch usually consisting of in terlocking knuckles formed upon the sections, and a detachable pin passed through the knuckles. The upper section CL of the guideboX is providedin its under face with a semicircular depression at each side of the center, and the lower plate has formed in its upper face corresponding and registering depres- 7o sions, whereby when the sections are locked circular channels a are formed for the reception of a threaded drive-shaft 17, which shaft extends forward and rearward of the machine. The central portion of the guide-box usually has an opening 18 formed therein extending through from top to bottom, and over the opening ateach side of its center semicircular straps 19 are secured to the top and bottom of the box, adapted to constitute seats fora sectional interiorly-threaded sleeve 20, the threaded bore of the sleeve being of the necessary diameter to snugly fit the circumference of the threaded shaft.

The drive-shaft is provided with a longitudinal face-groove 21, extending practically from end to end, and at its forward or inner extremity a socket 22 is fastened to the shaft, the opening whereof is polygonal.

At the rear of the guide-box a spur-wheel 9o 23 is connected with the drive-shaft, preferably by means of a feather passing through the hub and entering the groove of the shaft. By this means when the wheel is revolved to turn the shaft the latter is free to move for- 5 ward. The wheel 23 meshes with a pinion 24, secured to a short shaft '25, journaled in an extension of the guide-box, the said short shaft having a crank 26 connected therewith,

or other form of driving mechanism.

The extremities of an essentially U-shaped frame 27 are pivoted upon the trunnions of the guide-box, and upon said frame a clamp 28 is capable of sliding. The clamp comprises two horizontal members I) and b, hinged 1o 5 at one end and provided with a clampingscrew 29 at the opposite end to draw the m embers together when occasion may demand. Opposing channels 30 are produced in the members near the ends to receive the members of the frame 27, and a central and larger semicircular channel 31 is also formed in each member of the clamp, as shown in Fig. 5. The central channels of the clamp are adapted to receive the circumferential recessed surface 32 of the externally-threaded bit-rod casing 33, (shown in Fig. 6,) the said casing being provided also with a spiral external groove 34, extending nearly from end to end. The bow-section of the U-frame 27 rests upon the upper surface of the casing.

In the outer end of the casing the bit A is located. The bit comprises two members hav* ing approximately circular heads 37, the outer edges being the cutting-edges, and shanks 38, integral with the heads, the said shanks being beveled upon their inner edges at their junction with the heads, as is best shown in Fig. 7. The members of the bit are pivoted by their shanks to the outer end of a bit-rod 39, which bit-rod is capable of longitudinal movement in the casing, and the members of the bit are so pivoted that one is capable of sliding over the other. The cutting'edges of the bit-heads are located in recesses 40, formed in opposite sides of the casing, and between the beveled surfaces of the shanks of the bit a pin 41 is placed, which pin is held securely in the casing. When the bit-rod 39 is forced outward, the engagement of the beveled surfaces of the bit-shanks with the pin causes the heads ofthe bit to be forced outward through the slots 40. WVhen the hole is being drilled, the heads of the bit overlap one another, as shown in positive lines, Fig. 7, and extend beyond the casing but a slight distan ce farther than the external surface thereof. The bit-rod 39 at its inner end is threaded, and the threaded surface passes through a nut 42, which nut is adapted for'frictional contact with the innerend of the casing. The inner extremity of the bit-rod is made polygonal in cross-section to enter the opening of the socket 22, and the nut 42 is provided. with a series of peripheral apertures 43, adapted to receive one end of a crank-pin 44, as shown in Fig. 2.

In operation the base is fixed in position opposite the surface to be drilled, and, the parts of the machine being in proper position, the crank 26 is manipulated to revolve the wheel 23 to the right, whereupon the d riveshaft 17 is also revolved and fed forward by passing through the fixed sleeve 20. As the drive-shaft revolves it turns the bit-rod 39, and by reason of the frictional contact of the nut 42, carried by the rod, with the inner end of the bit-casing the casing is also revolved, and the bit and easing are carried forward by reason of the clamp 28 sliding upon the U-frame 27. \Vhen the hole has been drilled the desired depth, the thumb-screw 29 of the clamp is screwed firmly downward, so that the said clamp will tightly engage with the frame and prevent the forward movement of the casing without preventing the casing from turning. The nut 42 is now turned to the left about one-half a turn, and the pin -14 is inserted in one of the apertures 43 upon the right-hand side of the nut. WVhen the pin has engaged with one of the members of the frame, the nut will be prevented from revolving. A further manipulation of the driveshaft, the casing being stationary, will force the bit-rod outward, thereby causing the bit members to expand, the bit and the casing bein g meanwhile revolved also through the revolution of the bit-rod. The chips produced by the cuttings of the bit in the operations of boring and reaming find their escape from the hole through the spiral groove of the casing. When the pocket has been properly formed at the inner end of the hole the thumb-screw 29 is loosened and the latch of the guide-box is manipulated to permit the lower section of the box to drop downward, as shown in dotted lines, Fig. 3, whereupon the lower section of the sleeve is carried with the box-section and the drive-shaft may be readily disengaged from the bit-rod. The bit-rod being drawn rearward, causes the bit to assume its normal position, and when in this position, the thumb screw being loosened, the casing and bit-rod may be carried rearward and removed entirely from the hole. The bit-rod and driveshaft are thereupon again connected and the guide -box restored to its normal position, when the machine is in order for further work.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A drill for boring and reaming, comprising a tubular casing slotted at its forward extremity and provided with a pin extending transversely through said forward end, a 1'0- tary longitudinally-movable bit-rod extending into the casing from its rear end, and a combined boring and reaming bit pivoted to the forward end of the rod and normally projecting beyond the forward extremity of the said casing and bearing at its inner edge on the said pin, whereby when the casing and bitrod are rotated and simultaneously moved forward the bit will here, and when the casing is held from longitudinal movement and the rod rotated and moved longitudinally the bit will be thrown out through said slot and ream, substantially as set forth.

2. A drill forboring and reaming, comprising a tubular externally threaded easin g slotted at its forward extremity and provided with a pin extending transversely through said forward end, a rotary and longitudinallymovable bit-rod extending into said casing from its rear end, and a combined boring and reaming bitpivoted to the forward end of the rod and normally projecting beyond the forward extremity of the casing when in its boring position and projected laterally into its reaming position by sliding the rod forward and pressing the bit against said pin, substan tially as set forth.

3. A boring-drill and reamer comprising the tubular casing having a transverse slot 40 across its front extremity and a pin 41 at right angles to said slot, the rotary and sliding rod 39, extending into said casing from its rear end, a bit consisting in two cutters pivoted side by side to the forward end of the rod, having beveled inner edges at opposite sides of said pin, and curved heads the outer edges of which are the cutting-edges, substantially as set forth.

4. In a boring-drill and reamer, a bit having a shank 38, provided with an approximately circular head 37, the outer edge of which is the cutting-edge, the said shank being beveled on its inner edge at the juncture with said head, substantially as set forth.

5. A boring-drill and reamer consisting in a frame, a clamp sliding on said frame and provided with a screw for clamping it against longitudinal movement on the frame, a rotary tubular casing slotted-at its front extremity extending through the said clamp to slide therethrough and held from sliding therein when said screw is tightened, a trans verse pin in said slotted end, a rotary longitudinally-sliding bit-rod extending into the said casing from its inner end, a boring and reaming bit pivoted to the inner end of the rod, normally projecting longitudinally through the front end of the casing, bearing against said pin, and projected laterally thereby when the rod is slid forward in the casing, a not on the rod bearing against the inner end of the casing, and means for rotating the said bitrod, substantially as set forth.

(5. A combined boring-drill and reamer comprising a frame provided with an internally-threaded sleeve, a threaded drive-shaft extending therethrough and having a socket at its inner end, a bit-rod having its rear end shaped to fit said socket, whereby it will be rotated and projected forwardly, a nut 42 on the rod, means for locking the nut when desired, a casing inclosing the rod in advance of the nut and hearing at its inner end thereon, a clamp to prevent longitudinal movement of the casing with the rod when the said nut is locked, and a longitudinally-extending expansible boring-bit in the front end of the casing and projected or. expanded laterally into reaming position when the rod is projected forward in the said casing, substantially as set forth.

7. A combined boring-drill and reamer con sisting in the yoke or standard 12, having bearings at its'upper end, a vertically-swing ing frame having trunnions 15, mounted in said bearings, an internally-threaded sleeve mounted in said frame, the screw-threaded drive-shaft extending through said sleeve and the operating-gearing of the U-shaped frame, the inner ends of the arms 27 of which are mounted on said trunnions 15, a clamp 28, the members of which are free to slide on the arms 27 and to be clamped thereto, a bit-rod connected at its rear end to the drive-shaft to be rotated and projected thereby, a nut on the bit-rod, a locking-bar 44 therefor, an externally-threaded bit-casing inclosing the bit in advance of the nut and bearing thereagainst, the inner end of the casing having an annular groove 32 to engage the clamp, for the purpose set forth, and having a transverse slot 40 across its forward end, and an expanslble boring-bit in the said slotted end normally projecting longitudinally therebeyond to bore and adapted to be expanded laterally into reaming position when the rod is projected forward in the casing,substantially as set forth.

8. In a drill and reamer, a bit-rod having an inclosing casing provided with an external spiral groove to remove the detritus, and an expansible bit in the front end of the casing and projected into reaming position by sliding the bit-rod forward in the casing, substantially as set forth.

9. In a device of the character described, the combination, with a threaded drive-shaft, mechanism for revolving the said shaft, a pivoted guide-box constructed of two hinged members, and a sectional interiorly-threaded sleeve located in the guide-box and engaging with the threaded surface of the shaft, of a frame, a casing, a clamp held to travel upon the frame loosely surrounding the casing and provided with a binding-screw, anxexpansible bit located at one end of the casing, a rod held to turn and slide in the casing, connected at one end with the bit, and threaded at its opposite end, a socket connection between the threaded end of the rod and the driveshaft, and a lock nut located upon the threaded end of the shaft and engaging with the casing, substantially as and' for the purpose specified.

10. In a device of the character described, the combination, with a base provided with a spur at one end, a yoke pivoted upon the opposite end of the base,a guide-box pivoted in the yoke and constructed in two hinged sections, a sectional interiorly-threaded sleeve located in the box, and athreaded drive-shaft passing through the said sleeve, of a frame, a casing, a clamp held to travel upon the frame loosely surrounding the casing and provided with a binding-screw, an expansible bit located at one end of the casing, a rod held to turn and slide in the casin g, connected at one end with the bit, and threaded at its opposite end, a socket connection between the threaded end of the rod and the driveshaft, and a lock nut located upon the threaded end of the shaft and engaging with the casing, substantially as and for the purpose specified.

JULIUS R. IVATTSV Witnesses:

PERCY E. WILsoN, GEORGE J. BARRETT.

IIO 

